Now Playing: Man's Body Found in Stairwell of California Mall

Now Playing: ISIS Claims to Have Inspired Minn. Mall Attack

Now Playing: Shooting Shocks Shoppers at Wisconsin Mall

Now Playing: Experience Disney’s Animal Kingdom through magical ASMR sounds

Now Playing: New National Geographic series looks at 'Secrets of the Whales'

Now Playing: ‘GMA’ Deals and Steals for Earth Day

Now Playing: Bindi Irwin shares details on her road to motherhood

Now Playing: Lake Michigan faces effects of climate change and coastal erosion

Now Playing: Millennials shift to new work lives amid pandemic

Now Playing: Actress Eva Mendes sparks online parenting debate on spanking

Now Playing: How Oscars producers are putting on COVID-safe show

Now Playing: Major brands announce new price hikes to grocery staples

Now Playing: Hiker escapes bear face-off, experts warn encounters may be on the rise

Now Playing: Submarine with 53 people aboard goes missing

Now Playing: Biden seeks to reduce US carbon emissions in half by 2030

Now Playing: Biden announces goal of 200 million vaccine shots has been met early

Now Playing: Outrage after Ohio police fatally shoot teenage girl

Now Playing: DOJ announces new Minneapolis policing investigation

Now Playing: Millions wake up in polar temperatures as spring cold blast hits

Now Playing: Remove diet culture from your life with intuitive eating